Evidence map›Paper›PMID 42402574›Full record

ArticleBMC oral health2026

Impact of dentition alignment, scanning strategy and operator experience on the accuracy and time of intraoral scanning: an in vitro study.

Yuanyuan Chen, Yiyun Dong, Yiqun Tang, Yiwen Wu, Tiannan Chen, Jiang Tao, Junjun Zhao

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Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

7 authors.

Yuanyuan Chen *Department of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Yiyun Dong *Department of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Yiqun TangDepartment of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Yiwen WuDepartment of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Tiannan ChenDepartment of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Jiang TaoDepartment of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China. taojiang_doctor@sjtu.edu.cn.
Junjun ZhaoDepartment of General Dentistry, School of Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai, China. 13611967296@163.com.

Funding

Clinical Research Program of Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine JYLJ202415Cross-Disciplinary Research Funding of Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine JYJC202313
6 · The paper itself

Abstract

backgroundThe accuracy of intraoral scanning can vary across clinical scenarios. The aim of this study was to evaluate the effects of dentition alignment, scanning strategy, and operator experience on the trueness, precision, and efficiency of intraoral scanning.

methodsThree maxillary models representing aligned, crowded, and spaced dentition were scanned using an intraoral scanner (Alliedstar AS100). Three experienced operators and three inexperienced dental students performed intraoral scanning using three scanning strategies, each repeated ten times. Trueness and precision were quantified using root mean square (RMS) deviations following best-fit alignment in Geomagic Control X software, and scanning time was recorded. Data were analyzed using generalized linear mixed models.

resultsScanning strategy and dentition alignment significantly affected trueness and precision (P < 0.05), whereas operator experience showed no significant main effect. Non-linear strategies produced lower RMS deviations than the linear strategy (P < 0.001). Spaced dentition showed the highest deviations (0.16 ± 0.12 mm), while crowded dentition exhibited the lowest (0.13 ± 0.10 mm). Scanning time was significantly influenced by scanning strategy and dentition alignment, with the sweeping non-linear strategy showing the shortest acquisition time (P < 0.05). Tooth-level analysis revealed site-specific differences in scanning accuracy.

conclusionsDentition alignment and scanning strategy are primary determinants of intraoral scanning performance, whereas operator experience has a limited influence on full-arch accuracy.

Indexed as

Clinical CompetenceDentitionImaging, Three-DimensionalComputer-Aided DesignHumansImage Processing, Computer-AssistedMaxillaModels, DentalTime FactorsAccuracyDentition typesIntraoral scanningOperator experience

Identifiers

PMID42402574
PMCPMC13613752

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.